ENERGY-STORING-TYPE HIGH-PRESSURE ELECTRIC FUEL PUMP, FUEL-SUPPLYING APPARATUS, AND APPLICATION METHOD THEREFOR

摘要

An energy-storing-type high-pressure electric fuel pump, a fuel-supplying apparatus comprising the fuel pump, and an application method therefor. The energy-storing-type high-pressure electric fuel pump comprises an electromagnetic driving apparatus and a plunger sleeve cylinder component. The plunger sleeve cylinder component comprises a high-pressure volume, a plunger sleeve having a plunger hole, and a plunger capable of sliding within the plunger hole. A clearance volume of the plunger in the plunger hole is a high-pressure fuel chamber. A clearance volume between the electromagnetic driving apparatus and the plunger sleeve cylinder component forms a low-pressure fuel chamber. Under the action of the electromagnetic driving apparatus, the plunger sleeve cylinder component sucks a fuel in the low-pressure fuel chamber into the high-pressure fuel chamber and pressure-feeds the fuel into the high-pressure volume. The electromagnetic driving apparatus comprises an energy storage apparatus, a movable part, and a still part. The electromagnetic driving apparatus is controlled by a driving current to convert electrical energy into an alternating bidirectional driving force to drive the movable part into a reciprocating motion.